div,
p,
ul,
li,
ol,
h1,
h2,
h3,
h4,
h5,
h6,
header,
footer,
nav {
  box-sizing: border-box !important;
  margin: 0;
  padding: 0;
}
* {
  font-family: "微软雅黑";
}
.flex {
  display: flex;
  align-items: center;
}
.flex-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
